Hi Mike,

Thanks for the clarification.

It would be a good enhancement if this behaviour could be configured (i.e. I want only the cell which value changes to refresh).

This would allow implementing even better "high-performance" grids.

Thanks,
Andrey

Hi Andrey, 

I checked into this a little deeper and I am told that I am wrong and that the grid was updated to only invalidate the cell. Perhaps you are using an older version of the grid from before this change was made? What version do you have? Do you have the latest Hot Fix? 

Also, currently the grid seems to exchibid some strange behaviour...

Imagine I have a hierarchical UltraDataSource with two levels of data.

Now I start continuously updating the values of the cells on all levels...

The topmost band always refreshes the entire row.

The child bands refresh the entire row when a cell within a flat band region is selected.

The child bands refresh only updates cell when no cells selected within a flat band region.

Using .NET Reflector I have been able to identify the piece of code which causes the entire row to refresh...

In the UltraGridBand.DataSource_ItemChanged(object sender, ItemChangedEventArgs ea)
{
    ...
                UltraGridRow rowWithListIndex = currentParentRows.GetRowWithListIndex(ea.Index);
                if (rowWithListIndex != null)
                {
                    rowWithListIndex.ParentCollection.NotifyCalcManager_ValueChanged(rowWithListIndex);
                    rowWithListIndex.FireInitializeRow();
                    if (!(this.lastBoundList is IUltraDataRowsCollection))
                    {
// >>>> THIS IS THE CALL WHICH CAUSES THE ROW TO REFRESH <<<<<< //
                        rowWithListIndex.InvalidateItemAllRegions();
                    }
                }
    ...
}

As I said before, I simply bind a hierarchical UltraDataSource to the UltraGrid and begin updating values in the data source....

Please let me know if from here you can derive any way of preventing the entire rows to refresh?

Thanks,
Andrey